JGroups / News: Recent posts

Check out https://sourceforge.net/projects/javagroups/files/JGroups/2.9.0.GA/ReleaseNotes-2.9.txt/download for details

subject says it all...

Details at https://sourceforge.net/project/showfiles.php?group_id=6081&package_id=94868&release_id=651542

Reliable group communication based on IP multicast and configurable protocol stack.

Details at https://sourceforge.net/project/showfiles.php?group_id=6081&package_id=94868&release_id=638801

Reliable group communication based on IP multicast and configurable protocol stack

Details at https://sourceforge.net/project/showfiles.php?group_id=6081&package_id=94868&release_id=632134

Release notes at http://sourceforge.net/project/shownotes.php?release_id=626843&group_id=6081

Reliable group communication based on IP multicast and configurable protocol stack

Details and downloads are at http://sourceforge.net/project/showfiles.php?group_id=6081&package_id=94868&release_id=610286

Notes are at http://sourceforge.net/project/shownotes.php?release_id=579655&group_id=6081

The binary and src distributions were uploaded to SourceForge.
Enjoy,

at http://www.jgroups.org/javagroupsnew/docs/demos.html

Located at http://www.jgroups.org/javagroupsnew/docs/tutorial/html/index.html

Release notes can be found at http://sourceforge.net/project/showfiles.php?group_id=6081

The diff to beta-2 is mainly bug fixes, no new functionality.
I expect to release CR-2 by the end of June and GA in mid July.

elease Notes JGroups 2.5 beta 1

Version: $Id: ReleaseNotes-2.5.txt,v 1.6 2007/03/21 09:42:32 belaban Exp $
Author: Bela Ban

JGroups 2.5 is still API-backwards compatible with previous versions (down to 2.2.5). However, there are some changes:

• JDK 5 is required
• a major number of older protocols were tossed out, e.g. if you used protocols listed in vsync.xml, they won't be
  found anymore... read more

Contains a few bug fixes, nothing critical. Needed for JBossAS 4.2

Finally, after almost 5 months, JGroups 2.4 is here !

There are some cool features that I'll describe in more detail
below. Over 80 JIRA issues were resolved in 2.4, mostly bug fixes and
new functionality.

The good news is that 2.4 is API-backward compatible with all previous
versions down to and including 2.2.7. So, for those folks who are
using JBoss 4.0.x, which ships with JGroups 2.2.7 by default, this
means that they can simply replace their JGroups JAR file with the one
from 2.4 and benefit from the performance enhancements and bug fixes
that went into 2.4. For details on the JBoss/JGroups combinations see
http://labs.jboss.com/portal/jbosscache/compatibility/index.html.... read more

See release notes

Check release notes for details.

to 2.2.9.1, mainly the problem with JDK 1.4.2 crashing when the diagnostic hander tries to bind to an interface without any IP address

Contains Multiplexer, functionally complete and very stable. 16 smaller issues still need to be fixed for the final release

• Fix for the merge bug (multiple members merging while new members join)
• Fix for ENCRYPT
• Smaller fixes

I just released JGroups 2.2.9 final.

This still contains the merge bug as described in
http://jira.jboss.com/jira/browse/JGRP-139, but because it occurs very rarely (only when multiple members need to
merge, and new members join at the same time), I decided to release 2.2.9.

The merge bug (and another smaller bug) will be fixed in 2.2.9.1, which will be backwards compatible with 2.2.9.

2.2.9 is API backwards compatible with 2.2.8 and 2.2.7, but it is not compatible regarding the wire format.
So, you can replace your older (2.2.7 and 2.2.8) versions of JGroups with 2.2.9, but you cannot run a mixed cluster
consisting of 2.2.7/2.2.8 and 2.2.9 nodes. So if you want to upgrade, replace the JGroups JAR files on all the nodes of
a cluster.... read more

Release Notes JGroups 2.2.9

Version: $Id: ReleaseNotes-2.2.9.txt,v 1.1 2005/09/01 12:04:15 belaban Exp $
Author: Bela Ban
Date: Sept 1 2005

JMX support

The channel and most protocols can now be accessed via JMX. This can
be used in any environment that provides an MBeanServer, e.g. JBoss or
JDK 5. With JDK 5's jconsole, for example, retransmission counters can
be viewed in realtime, or operations can be invoked that dump the
retransmission windows for NAKACK etc.
More information is available at
http://wiki.jboss.org/wiki/Wiki.jsp?page=JMX.... read more

Major points:
Fast Message marshalling

---

• Replaced Externalizable for Message with Streamable, resulting in much faster marshalling and
  reduced size of marshalled messages, allowing for more messages to be sent / second
• org.jgroups.tests.MessageSerializationTest2 can be used to compare Externalizable with
  Streamable:
• For 50000 messages, size reduction is almost 50%, marshalling 150% faster and unmarshalling 650% faster
  flags="-Xmx500M -Xms500M -XX:NewRatio=1 -XX:+AggressiveHeap -verbose:gc
  -XX:+DisableExplicitGC -XX:ThreadStackSize=32 -XX:CompileThreshold=100"
  java $flags org.jgroups.tests.MessageSerializationTest2 -num 100000 -add_headers false
  serialized size=8588935, streamable size=5788899, streamable is 48 percent smaller
  serialized write=831, streamable write=331, streamable write is 151 percent faster
  serialized read=1352, streamable read=180, streamable read is 651 percent faster... read more

See release notes